Apparatus for scoring and cutting wallboard and the like

Claim 1

Apparatus for cutting a workpiece of sheet material such as wallboard, plasterboard or the like, said apparatus comprising: (a) a floor mounted support frame; (b) a table disposed on the frame for carrying the workpiece in a generally horizontal plane; (c) drive means mounted on the frame and disposed above the table for holding the workpiece against said table and for moving said workpiece in a selected direction of travel; (d) a pair of relatively elongated spaced apart, parallel, vertically aligned, stationary tool guides extending from the support frame generally transversely to the direction of travel of the workpiece and disposed, respectively, above and below the table, each of said tool guides having at least one free end; (e) at least one tool assembly slidably mounted on and readily removable from the free end of each of the tool guides and provided with means for releasably locking said tool assembly in any of a plurality of selected positions on said tool guide; and (f) a generally circular blade freely rotatable one each tool assembly and disposed thereon for penetrating the workpiece as said workpiece is moved along the table, said blade being formed with a plurality of circumferentially aligned teeth projecting radially outwardly from a tapered, peripheral edge portion of said blade.